Polyazo dyes.



f semen?! sssxexmns T0 mmsma'msmmn vomi. rmsne BAYER e; m; ee'qemsnmw, GERMANY, A;

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To aZZ wfmm it may oncem; 'Be it known that we, HUGO Scawm'rzm andARTHUn ZART doctors. of philosophy,

chemists, citizens 0f the German-Empire, re-

siding at Eiherfeld, Germany, have inizel nF- v ed newand useful Improvements'in Polyazo Dyes, of which the follewviugg'- ise spemficaf tion.

The present invention relates to the manufacture and produetionfof new e220 coloring, matters having most probably the formula 1 soasjA/wkmg" /Yom R-H-EF- il siinN -fi R meaning an em eompetmd being free The new dyes are obtained by fegmbining the diazo cempounds prepaxedls from an mninoazo cempound' containing. besides the one amino group no other amine-0r oxv groups with-the 5.5-di0xy-2.2'di1iaphthyfamin-7'.7-disulfonic acid:

wx/wsfw v vk The-new dyes are after being. dried and pulverized in the shape oftheii' alkaline salts dark powders selubls in' Water; yield- Ting upon reduction. with stamens chlorid and hydmchloric acid an el-emetic emin, a diamin and a compound of the formula;

dyeing cotten. from violet to greenish-blue renew :mrss.

sp em wmn Remn -j Patented Se 51051912. Ailplidation filed Dcceixflyer g, 1911.; sum 1 0., 864,839.

SUED

shades wh'feh On being developed with di-- azotized pars-hibmni'lin change inte shades 1 fast. to 'washi-ng and capable of being dis charged t0 a pure white.

Q The .f ohowmg example mey further Hills trate the invention, the parts "being by weight- 904: parts (2 H101.) of the mono hydrechlor ic" aeldand combined with, 4.61.

parts offhe 5.,5 didxy-QQf-diriaphthylamim sodium bicarbonate. The mixture isheated 'andthe dye is salted out with common salt; .filteiged 0% and dried.

The new dye having-"most fdbab1y the formula:

7.7-disu1f011ie acid eontainingan excess if is int heshepe ef'its sddiumwsaltauderk powder which is easily solulqle in water with concentrated-sulfuric 'acid with a green 601- a blue exploration and which soluble in oration, Ups}; reduction with "stannous bhlerid and hydrochloric .acidit is split. up in'te'6.6-d.iam1n0-5.5'-di0xy-2.2-dina hthylemin-TT-disulfonic acid, ,1' .4 =-napht ylenediamin-7 -su1f0nic said sled permphenylenev diamin sulfonic acid. It dyes cotton green+ ish-blue. .The shade after being developed with diazotized para-nitranilin is greenishblue fast to washing. It can be discharged R meaning an azo compound being free from amino and oxy groups which are after being dried and pulverized 1n the shape of their alkaline salts dark powders soluble in water: ylelding upon reduction w th Stan'- nous chlorld and hydrochlorlcacld an aro matic amin,-a dia'min and a compound of the.

. formula:

dyeing cotton from violet to greenish-blue shades which on being developed with diazotized para-nitranilin change into shades fast to washing and capable of being discharged to a pure white, substantially as described.

-naphthylamin-7.7-disulfonic 2. The herein described new dye having most probably the formula:

-\ I l I l which is after being dried and pulterized in the shape of its sodium salt a dark powder soluble in concentrated'sulfuric acid with a greenish-blue coloration; yielding upon reduction' with stannous 'chlorid "and hydro chloric acid 6.6T-diamin0 5.5'-dioxy-2.2-diacid, phenylenediamin sulfonic acid and 1.4-naphthylene-diamin-7-sulfonic acid; dyeing cotton greenish-blue, which shade after being developed with diazotizcd para-nitranilin bluish-violet fast to washing whichcan be discharged to' a pure white, substantially as described.

In testimony whereof we have hereunto set our hands in the presence of two subscriblng witnesses.

HUGO SCHWEITZER. 1. s] ARTHUR ZAR-T. as

\Vitnesses Hanna NUlER, A. NUFER. 

